JPS6141236A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To know the state of the station of the remote side when the speech communication is carried out among plural radio stations by means of radio waves, by securing such a constitution where both an own station code and a state code are transmitted automatically prior to the voice call and the radio equipment receives, decodes and displays those two codes. CONSTITUTION:When a certain radio station performs the speech communication with other three radio stations, the relevant radio station transmits the radio wave of a format shown in a figure (a). Then a voice message is transmitted. The received transmission data is demodulated by an FM demodulator 30 and then demodulated by an MODEM24 and then decoded by a decoder 44 to be supplied to a CPU35 through an input port 38. The station code of the transmission side contained in the transmission data supplied to the CPU35 is stored to a reception code memory RAM37 together with a control code CC. The CPU35 decides that the code CC is equal to 1. Then the state of the station of the remote side is displayed as long as the state and the code of the remote side station are displayed at a display device 48 through an output port 39.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wireless communication device for transmitting and receiving voice and digital data used in business wireless communication devices, NOM (multi-channel access) wireless communication devices, etc. .

Conventional configuration and its problems As shown in Figure 1, when a plurality of radio stations 1 to 4 make calls and exchange information using radio waves of the same frequency, conventionally, the radio stations have They both listened to the voice and talked to the other party, and prior to the voice call, a selective calling signal was sent out to select a specific radio station and the voice call was made. For this reason, when making a mutual voice call between multiple wireless stations, it is necessary to clearly indicate which wireless station is currently communicating by voice, such as by stating the name of the transmitting station, etc.
Another disadvantage is that if the name of the transmitting station is first asked at the receiving wireless station, it becomes unclear.

OBJECTS OF THE INVENTION The present invention eliminates the drawbacks of the above-mentioned conventional example, and aims to make it clear which station is making the call when a plurality of wireless stations are making a voice call with each other.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention automatically transmits a local station code and a status code prior to voice communication when a plurality of wireless devices perform voice communication using a common radio wave,
The wireless device that receives this is configured to decode it and display it on the display, allowing the user to identify the other station and its status (without using audio).
For example, in the case of a taxi radio, it is possible to obtain the effect of knowing whether the vehicle is real or empty.

Description of examples DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below by way of an embodiment with reference to the drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

Reference numeral 21 denotes a microphone, and the output signal from the microphone 21 is supplied to a microphone amplifier 22 for amplification and then supplied as one input to a changeover switch circuit 23. 2
4 is a modulation/demodulation device (hereinafter referred to as a modem), and the modulated output of the modem 24 is supplied as the other input of the changeover switch circuit 23. The input selected by the switch circuit 23, that is, the output obtained by amplifying the microphone output or the output of the modem 24, is supplied to the 7M modulator 25 to
After being modulated by M, it is supplied to the transmitter 26.
The output is supplied to the antenna 28 via the changeover switch circuit 2 for transmission. The radio waves received by the antenna 28 of another radio station are sent to the receiving unit 29 via the changeover switch circuit 27.
The received output is supplied to a 7M demodulator 3o for demodulation.

The demodulated output from the FM demodulator 30 is supplied to the demodulator side of the modem 24 and the audio amplifier 31, and the output of the audio amplifier 31 is supplied to the speaker 32. Further, the transmitting section 26 and the receiving section 29 are configured to be switched by a transmitting/receiving switching circuit 33, and in conjunction with switching between the transmitting section 26 and the receiving section 29 by the output of the transmitting/receiving switching circuit 33, is switched between the transmitting section 26 side and the receiving section 29 side.

On the other hand, 34 is a microcomputer, and the microcomputer 34 is essentially cptrses.

ROM36. RAM37. Input boat 38. It consists of an output port 39 and a timer 4o, and a program for controlling the CPU 35 is stored in the ROM 36. c.
The ptrss is controlled according to a program stored in the ROM 36, and reads input data supplied to the input port 38 as necessary, performs calculations, processes, and stores it in the RAM 37.

It performs processing such as comparison, and latches the output according to the processing result, or outputs it through the output port 39 without latching. The input port 38 includes the output of the numeric keypad switch 41, the output of the function change instruction nasuinochi 42 that instructs to change the function of the numeric keypad switch 41, the output of the PTT switch 43 that instructs voice communication by pressing,
a decoder 4 that receives and decodes the output of the modem 24;
4, the output of the end key switch 46, the output of the transmission instruction switch 46, and the reception detection output of the receiving section 29, which will be described later, are supplied. The CPU 35 sends data to the encoder 47 via the output port 39, a switching signal to the changeover switch circuit 23, a control signal to the transmission/reception switching circuit 33, a meet instruction signal to the audio amplifier 31, a display 48, . 50, 51, and 52 respectively according to the purpose, and a drive signal to the buzzer 49.

Note that the transmission/reception switching circuit 33 selects the receiving side in preference to the transmitting side when not receiving a switching signal, and the changeover switch circuit 23 selects the receiving side in preference to the transmitting side when not receiving a switching signal.
The output signal from the microphone 21 via the microphone 21 is selected and supplied to the 7M modulator 25, and when transmitting, priority is given to the transmission of the audio signal. Figure 3 shows the details of the RAM 37 part in Figure 2. This is shown in . In FIG. 3, 37-1 is a local station code RAM that stores the local station code, 37-2 is a received code storage RAM that stores the format code of the received radio wave, which will be described later in FIG. 4, and 37- 3 is a partner code RAM that stores the code of the partner that selected and called the own station, 37-4 is the own station status RM V that stores the status of the own station, and 3-6 is a partner code that stores the code and status of the other station. Status reception RAM, 37-
Reference numeral 6 denotes a partner code message reception RAM that stores a plurality of partner station codes and tasks (for the sake of explanation, only one number is used), and 37-7 a message counter that counts the number of stored partner station numbers and tasks. Reference numeral 37-8 is a destination code message sending RAM that stores the destination code and message to be sent. 37-9 is a call state memory RA that stores the fact that a selective call has been received.
Reference numeral 37-10 denotes an incoming call state storage RAM which indicates that the message has been received, that is, the other party's code message reception RAM 37-6 is stored. RAM37-9, 37
-10 may be something like a flag register.

FIG. 4 shows the code formats transmitted and received between wireless stations. FIG. 4(a) is transmitted when making a voice call, and the status code is transmitted only when the user has set it in advance. A line in FIG. 4 is made when a selective call is made, and a line in FIG. 4 is made when transmitting a message to a specific partner station.

FIG. 4d shows the format of the selective call call confirmation return signal shown in FIGS. In Fig. 4, originally the control code CG=1
Bit synchronization and frame synchronization codes are added before steps 4 to 4 to establish synchronization of the receiver, but these are known techniques and are not essential to this patent, so they are omitted.

It is also omitted in the explanation of the operation below. CG is a control code; for example, GG=1 indicates a voice call, CC=2 indicates a selective call, 00=s indicates a message transmission, and 0O=4 indicates a confirmation signal ( 50K) and a NACK signal in which the transmitted code is not accepted. FIG. 6 is a flow chart explaining the operation of the wireless station.

The operation of the embodiment of the present invention configured as described above is stored in the ROM 36 according to a certain program.
This will be explained using FIGS. 2, 3, 4, and 6.

In one embodiment of the present invention, the own station code is stored in advance in the own station code storage area (FIG. 3 37-1) provided in the RAM 37 via the numeric keypad switch 41 before sending or receiving. shall be. The local station code RAM 37-1 is backed up by a battery, etc., so once it is set, it is retained even if the wireless station is powered off, but other RA
M37-2.37-3.37-4.37-5.37-6
is set to the initial condition (all zeros) when the wireless station is powered on, the memory is in a cleared state, and the task counter (37-7) is also zero.

First, a case where voice communication is performed will be explained. A case will be described in which the wireless station 1 in FIG. 1 performs voice communication with the wireless stations 2, 3.4. In this case, the details of the operation flow of 0 radio wave emission in which a radio wave in the format shown in FIG.
Since this is not essential to this patent, it will be omitted.

Note that if the user of the wireless station 1 sets the status code in advance, its contents will be stored in the own station status RAM 37-4, and in the case of radio wave emission, the status code will be set as shown in Figure 4a. is emitted, but this part will not be emitted unless it is set in advance. The radio stations 2, 3.4 that have received this radio wave are in a standby state (step a) in the flowchart of FIG. That is, the transmission/reception switching circuit 33 receives a control signal for controlling the switching to the transmission side via the output port 39.
It is not supplied from the PU 35, the receiving unit 29 is put into operation by the transmitting/receiving switching circuit 33, and the changeover switch circuit 27 is also switched so that the output from the antenna 28 is supplied to the receiving unit 29.

In this state, it waits for transmission data from other stations (destination stations including base stations) to be received (step a,
b). When transmitting data from the wireless station 1 is received, it is detected whether the received signal level is higher than a predetermined level, as is known in the art.
If it is above a predetermined level, the reception detection output is input to the CPU 35. The received transmission data is demodulated by the 7M demodulator 3o, demodulated by the modem 24, decoded by the decoder 44, and sent to the CP via the input port 38.
Supplied to U35. The sending station code in the sending data supplied to the CPU 35 is stored in the receiving code storage RAM 37τ2.
is stored together with the control code CC. In step C, the CPU 35 determines that the control code CC=1, and in step d, if the partner station code and status are set on the output port 39 and display 48, the status is displayed. The determination of 0C=1 in step C is based on the FM demodulator 30° modem 24. Decoder 44. The code format data shown in FIG. 4a is stored in the reception code memory 1'lAM37-2 through the input port 38°CPU 35, and the control code CC
f: Determined by checking with the CPU 35. Steps d and s in Fig. 6 will be required in the explanation of the operation later.
, aθ are all performed as described above, so these steps will be briefly explained in the following explanation. Therefore, wireless station 2.3.4 knows that wireless station 1 is sending a voice message, and if a status code is set, it can know the status of wireless station 1, so it is necessary to listen to the content. It is sufficient for a wireless station to enter into communication with wireless station 1. Unlike conventional voice calls, there is no need to use voice to identify yourself as the wireless station 1. For example, in the case of a taxi, you can use the status code sent to know whether the vehicle is real or empty, making for efficient voice communication. becomes possible.゛Next, the case of performing selective call communication will be explained.

A case will be described in which the wireless station 1 in FIG. 1 selectively calls the wireless station 2 and enters into communication. At wireless station 1, change the partner station code in Figure 4 using switch key 42 and numeric key switch 4.
1, and the control code CC=2 in FIG. 4 and the partner station code are set in the partner code message sending RAM 37- in FIG.
8 is stored.

In this case, the task code is not set, so that part remains in its initial state (all zeros), and radio waves in the format shown in Figure 4 are emitted from radio station 1 (operation flow for radio wave emission). The details are omitted as they have no essential relation to this patent) The operation of the wireless station 2.3.4 that received the radio wave in Figure 4 will be explained using the flow chart in Figure 5. . When the CPU 35 confirms that CC=2 in step d after passing through steps a, b, and c, in step e, the own station code stored in the own station code RAM 37-1 and the own station code stored in the RAM 37-2 are A match with the partner station code is checked, and since wireless stations 3 and 4 do not have their own station codes, the process returns to step a. Since wireless station 2 matched the own station code,
In step f, it is checked whether the call has already been received. If the call is an incoming call, which will be described later, if the call is not an incoming call, the partner station code is stored in the partner code RAM 37-3 in step g, the buzzer 49 is sounded in step h, and the display 48 The destination station number is displayed and the incoming call status is stored in the incoming call status storage RAM 37-9. Next, in step i, the transmission state is entered, the changeover switch circuit 23 is switched to the output side of the modem 24, the transmission/reception switching circuit 33 is switched to the transmission side, the transmission mode is set, and the outgoing data is then sent to the modulation side of the modem 24. Confirmation data (hereinafter referred to as OK data) to confirm
Send. In steps j and l, if the status code has already been set in the wireless station 2, the control code C
Following G=4, the own station code, the other station code 1/(Continued, the own station status RAM
The shape code is encoded by the encoder 47 according to the memory of 37-4.
It is encoded, modulated by the modem 24, modulated by the 7M modulator 25, and transmitted. When the transmission is finished, the CPU 35
The changeover switch 23 is switched to the microphone 21 side by a command from the user.

Next, in step m, it is checked whether the PTT switch 43 is on, and if it is on, the buzzer 49 stops the alarm in step n, the incoming call status memory RAM 37-9 is cleared to zero, and in step P The output of the microphone 21 is sent to the amplifier 22. Changeover switch 23, 7M modulator 25. Transmitter 2
6. Transmission/reception switch 27. Radio waves are emitted via the antenna 28 and voice communication with the wireless station 1 becomes possible.

Now, in step f, we explained earlier that the call is not in the incoming call state, but if the call is in the incoming state, that is, the user has already received a selective call from another wireless station and sent back a confirmation signal, but the user Assuming that you are unable to turn on the PTT switch 43 because you are in a remote location, etc.
As already explained, in step h, the incoming call status memory RAM3
Since the incoming call status is still stored in 7-9,
The incoming call state is confirmed in step f, the transmitting state is entered in step aX, and the NACK signal (NO
T ACKNOWLKDGIC signal) is transmitted.

The operation of each block in FIG. 3 in this case has already been explained and will be omitted here. The format of the NACK signal is the same as that shown in FIG. 4e, and a code indicating NACK is returned as the status code. Therefore, in the case of an incoming call, even if a status code is set in advance, the status code is not returned, but the status code indicating the incoming call status is sent with priority (the NACK code is stored in the RAM 37-9). ) Return to step a.

As described above, in the case of a selective call call, radio station 1 automatically sends a response signal back from radio station 2 even if the user of radio station 2 does not respond, and in that case, the user of radio station 2 By setting the status code, you can know the status. Also, if the wireless station 2 has already received a selective call from another wireless station in advance and the user has left the site, the PTT switch 43
If it is not possible to make a single answer, a NACK signal is sent back, so the wireless station 1 can know this.

As explained above, extremely efficient selective call voice communication can be realized without the need for manual confirmation.

Next, message transmission communication will be explained. The service code shall be agreed upon between the radio stations in advance. The case where a message is transmitted from wireless station 1 to wireless station 2 in FIG. 1 will be explained.

In the radio station 1, the partner station code and message code shown in FIG.
4, and radio waves in the formant shown in FIG. 4C are emitted from the wireless station 1. Note that the details of the operation flow of radio wave emission shown in FIG. 4C are a known technique and are not related to the present invention, so the details will be omitted. Next, the operation of the wireless station 2 that has received the radio wave shown in FIG. 4C will be explained using the flow chart shown in FIG.

The operations of step a and step b have already been explained and will be omitted here. Steps c, d, and s are followed, and the CPU 35 confirms that GO=s, as already described in detail in the case of voice communication, and at step t, it is the own station code, so the process goes to step U. In step U, the CPU 35 refers to the RAM 37-10 to check whether the message code L7'c has already been received, and if it has not been received, displays an incoming call display on the display 50 in step If it has been received, the process directly proceeds to step W.

Here, the message counter 37-7 is checked to see if N=K, and if N=, that is, the other party code/message RAM 3
7-6 are all stored and already in selective call communication, a NACK signal is transmitted to the wireless station 1 in step az in exactly the same manner as described in step t. Radio station 1 learns that the memory of radio station 2 is already full of first-come, first-served requests and is in a state where it cannot be accepted. If the counter is not N,,=, the counter is incremented by 1 in step
The information is stored in the AM37-es, and the buzzer sounds for a certain period of time in step 2. In the selective call voice communication described above, the buzzer sounds in step h until the user turns on the PTT switch, but in the case of message transmission, the buzzer sounds for a certain period of time (for example, 10 seconds). . Then steps aa, ab,
By ac and ad, i in the case of selective call voice communication,
A confirmation signal is returned to j, as in the case of 1.

Next, the case of receiving a confirmation signal and a NACK signal in selective call voice communication and selective call requirement transmission will be described. Radio station 1 receives confirmation signal from radio station 2 or N
The case where an ACK signal is received will be explained using the flow chart of FIG. First step a, b, c
, d + swo, [C=4 is confirmed in step ae, and it is confirmed that it is the own station code in step af,
The buzzer sounds for a certain period of time at step ag, and step ah
It is checked whether the code is a NACK code, and if it is a NACK code, NACK is displayed on the display 51 in step ai.
If there is no NACK, the partner station code and status are displayed on the display 48 in step aj.

Next, in the wireless station 2, the other party's code message reception RAM 37-6
The operation when the user reads out the business information stored in the 6th section
This will be explained using the flowchart shown in the figure. If the message has already been stored in the wireless station 2 as explained above in the case of message transmission, an incoming call will be displayed in step V of FIG. 6, and the user of the wireless station 2 will see this. Know that your business is memorized.

The user turns the change instruction switch to O in step b& in Figure 6.
When the numeric key switch 1 is turned on in step bb, the contents stored in the first register (2) of the remote party code message receiving RAM 37-6 shown in FIG. 3, that is, the remote station number and message are displayed on the display. This method is called first-in, first-out, and the RAM37-6
The contents stored in are displayed first, allowing the user to know the other party's station number and business. Next, in step bd, when the end switch 45 is pressed, the display is erased and the reading is ended. If the end switch 45 is not pressed and "1" of the numeric keypad switch 41 is pressed again in step bf, the memory of register 2 of RAM 37-6 is erased in step bg, and the memory contents of register 2 of RAM 37-6 are stored in the register. To (2), the stored contents of register (2) are sequentially shifted to register (2) one stage at a time. Next, in step bh, the task counter (37-7) N in FIG. 3 is decremented by one. Next, in step bi, it is checked whether the counter a=O, and N=o
If not, the process returns to step bC, and the contents stored in the register (2) of the RAM 37-6 are displayed, allowing the user to know the next partner station number and business. With this method, the user of wireless station 2 can
The partner station number and business information stored in 7-6 can be sequentially displayed on the display. At this time, the memory contents are sequentially decreased by 1 in steps bg and bh, and in step bi, N=0.
If this is true, the incoming call display is turned off in step bj, and the reading operation is completed. It is the 0PU35 in FIG. 2 that is proceeding with the operation flow shown in FIG. 6, but since the operation of the 0PU35 is fast, the
The operational flow for reading out the contents of an incoming message shown in the figure can be processed in parallel in a time-sharing manner, but when receiving a selective call or message transmission, the flow in Figure 5 can be changed to Figure 6. A program is set in the ROM for cpuss processing in priority to the flow of .

Effects of the Invention The present invention has the above-described configuration, and when voice communication is performed between wireless stations using the present wireless device, the received code and status code of the other station are displayed on the display of each wireless station. Since each wireless station is configured to display the information, each wireless station can know which wireless station is making a call and the status of that wireless station without relying on audio, allowing efficient voice communication. I can do it.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a wireless communication system to which the present invention is applied, FIG. 2 is a block diagram showing the configuration of a wireless communication device in an embodiment of the present invention, and FIG. 3 is a storage device (
FIG. 4 is a schematic diagram showing the transmission data format of the present invention, and FIGS. 5 and 6 are flowcharts explaining the operation of an embodiment of the present invention. be. 1.2, 3.4... Radio station, 21...
Microphone, 22...Mic amplifier, 23.
...Switch switch), 24...Modulator/demodulator, 26...FM modulator, 26...Transmitter, 27...Switch , 28...
・Antenna, 29... Receiving section, 30...
FM demodulator, 31...Audio amplifier, 32...
...Speaker, 33...Transmission/reception switching circuit, 34
・・・・・・Microcomputer, 36・・・・・・
CPU, 36...ROM, 37...RA
M, 38...Input port, 39...Output port, 4o...Timer, 41...
Numeric keypad switch, 42...Function change instruction key switch, 43...PTT (Press toe)
talk) switch, 44...decoder, 45.
...End key switch, 46...Transmission instruction switch, 47...Encoder, 48...
... Indicator for partner station code and task or status, 49
,...Buzzer, 5o...Incoming call indicator, 5
1...Incoming call indicator, 62...NACK
display. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] It is used to communicate between multiple radio stations using digital data signals and voice signals, each of which includes a transmitting means,
and a transmitting/receiving switching means, wherein the transmitting means transmits a digital data signal having at least an own station code from the transmitting station, and the receiving station receives the transmission by the receiving means, and the receiving station receives the transmission. The own station code and the status code are stored in a storage means, and the contents of the storage means are displayed in characters, and furthermore, when the receiving station responds to the transmitting station, communication is performed with each other by voice signals from now on. Configured wireless communication device.